Jae-gun and Ga-eun, who have known each other since childhood, still live next door to each other. Jae-gun has had a crush on Ga-eun for a long time, but Ga-eun simply believes that young Jae-gun is mistaken and marries someone else. After Jae-gun becomes an adult, Ga-eun finds herself trapped with a husband who commits domestic violence and infidelity. Suffocated and with nowhere to go, Ga-eun decides to end her married life on an emergency staircase when Jae-gun approaches. "Are you going to get a divorce? If so, then I have to confess."